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. Author manuscript; available in PMC: 2020 Dec 9.
Published in final edited form as: Oral Oncol. 2019 Jul 3;96:7–14. doi: 10.1016/j.oraloncology.2019.06.017

Fig. 2.

Fig. 2.

Overall survival (OS) by (A, B) tumor programmed death ligand 1 (PD-L1) expression and (C, D) human papillomavirus (HPV) status.